A new paper argues Microsoft exaggerated its quantum claims a year ago

A critique published in Nature Wednesday calls the basic technology behind Microsoft's "breakthrough" quantum computing chip the Majorana 1 into question. Microsoft unveiled the chip in February 2025 and said it featured a brand-new technology known as a topological qubit. Topological qubits, they said, would be the "building blocks" for their future quantum computer. Microsoft announced the next generation chip Majorana 2 at Build earlier this month.

But in a peer-reviewed article, Henry Legg, a physicist at the University of St Andrews, reanalyzed Microsoft's data on their device and argued that the company's researchers did not conclusi …

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